diff --git a/Dockerfile.core b/Dockerfile.core
index 312030e..55f37e2 100644
--- a/Dockerfile.core
+++ b/Dockerfile.core
@@ -34,7 +34,7 @@ FROM alpine:latest
 
 RUN apk update && \
     apk upgrade --no-cache && \
-    apk add --no-cache tzdata && \
+    apk add --no-cache tzdata ca-certificates && \
     cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
     echo 'Asia/Shanghai' >/etc/timezone && \
     rm -rf /var/cache/apk/*